BaZi vs Saju — two names, one chart

If you have read about BaZi and about Saju and come away thinking they sound suspiciously alike, you are right. They are the same system: the Four Pillars of Destiny, built from your birth year, month, day, and hour. BaZi is the Chinese name and lineage; Saju is the Korean one.

Why two names at all

The names count different things in the same chart. Four pillars, each written with two characters, gives eight characters. Korean practice names the pillars — Saju (四柱), “four pillars.” Chinese practice names the characters — BaZi (八字), “eight characters.” If you built both charts for the same person born at the same moment, you would write down the same stems and the same branches.

What is genuinely shared

• The same ten Heavenly Stems and twelve Earthly Branches.
• The same Five Elements — wood, fire, earth, metal, water — and the same cycles of generating and controlling between them.
• The same Day Master logic: the day pillar’s stem is “you,” and the rest of the chart is read in relation to it.
• The same Ten Gods framework for naming how each other character relates to your Day Master.
• The same luck-cycle idea: a ten-year major cycle and an annual cycle passing over the natal chart.

What actually differs

The differences are cultural and practical rather than structural.

• Emphasis. Korean readings often lead with the ilju (the day pillar as a two-character pair) as a compact portrait of a person. Chinese practice more often goes straight to structure and useful-god analysis.
• Vocabulary. Same concepts, Korean pronunciations: ilgan for Day Master, ohaeng for the Five Elements, daewoon for the ten-year luck cycle.
• Where you meet it. In Korea, Saju is ordinary — a café reading, a question before a job change, something friends do together. That everyday register shapes how it gets explained.
• Calendar edge cases. Practitioners differ on details like how to handle true solar time and local longitude, which can shift an hour pillar. This is a live disagreement inside both traditions, not between them.

So which should you read?

Either — they will not contradict each other on the chart itself. If you search in English, you will find more material under BaZi and Four Pillars of Destiny. If you want the Korean register, look for Saju. This site is Korean-rooted, so we use Saju vocabulary and explain the BaZi term whenever it is the one you are more likely to have met.

How we read it here

We stay on the possibilist side of the tradition. A chart shows leanings and timing, not a fixed future — so every line we generate is written as “this may lean toward…”, never as a guarantee, and we never attach a score to a person. What you do with the weather is yours.